US4666359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Towable dolly
Assignee: Individual
•
Filing: 1985-10-01
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Granted: 1987-05-19
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Expires: 2005-10-01
Abstract
Abstract A towable dolly comprises a platform for supporting an object either alone or on a standard dolly, a wheel assembly pivotally secured to the forward end of the platform, and a lifting or tilting assembly for tilting the platform upwardly at its rear end relative to the wheel assembly so that it is raised from the ground in its towing position. A tow bar assembly projects forwardly from the wheel assembly for connection to a standard vehicle tow bar connector.
Inventors
- 👤 Willard J. Parr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:54
CPC Classifications
B; B62; B62D; B62D63/00; B62D63/06; B62D63/061
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
A towable dolly comprising: a continuous, flat support surface for supporting a standard pushable dolly; a vertical, rigid support frame mounted at the forward end of the support surface; fastener means on the support frame for securing a standard pushable dolly carried on the platform to the support frame; a frame assembly projecting forwardly from the forward end of the support surface; a wheel assembly pivotally secured to the forward end of the frame assembly; a tow bar assembly pivotally secured to the wheel assembly for securing to a towing point on a vehicle for towing the dolly; a forwardly projecting lever arm secured to the frame assembly at one end and pivotally connected to the wheel assembly at an intermediate point in its length, the lever arm having a free end projecting forwardly of said wheel assembly; and a lifting device acting between said tow bar assembly and the free end of said lever arm for urging the platform between a horizontal, ground position and a raised, tilted position in which the rear end of the platform is tilted upwardly relative to the wheel assembly.
Claim 2
Dependent Claim
186 words
A towable dolly comprising: a continuous, flat support surface for supporting a standard pushable dolly; a vertical, rigid support frame mounted at the forward end of the support surface; fastener means on the support frame for securing a standard pushable dolly carried on the platform to the support frame; a frame assembly projecting forwardly from the forward end of the support surface; a wheel assembly pivotally secured to the forward end of the frame assembly; a tow bar assembly pivotally secured to the wheel assembly for securing to a towing point on a vehicle for towing the dolly; a forwardly projecting lever arm secured to the frame assembly at one end and pivotally connected to the wheel assembly at an intermediate point in its length, the lever arm having a free end projecting forwardly of said wheel assembly; and a lifting device acting between said tow bar assembly and the free end of said lever arm for urging the platform between a horizontal, ground position and a raised, tilted position in which the rear end of the platform is tilted upwardly relative to the wheel assembly.
Claim 3
Dependent Claim
74 words
The towable dolly as claimed in claim 1, in which said tow bar assembly includes a horizontal cross member, and said lifting device comprises a jack acting between said cross member and said lever arm, said jack comprising extendable means for moving between a retracted position and an extended position in which said lever arm is urged downwards relative to said cross member so that the rear end of said platform is tilted upwards.
Claim 4
Dependent Claim
32 words
The towable dolly as claimed in claim 2, in which the frame assembly includes a horizontal cross member and the forwardly projecting lever arm is secured to said frame assembly cross member.
Claim 5
Dependent Claim
21 words
The towable dolly as claimed in claim 1, including a shock absorber assembly for securing the wheel assembly to the platform.
References Cited (Backward Citations)
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US3455474A
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US4044967A
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US4348143A
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US4295772A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |